Reflector for electric lights.



D. J. LAMBERT.

REFLECTOR FOR ELECTRIC LIGHTS.

' APPLICATION FILED IuLY s, 1914.

191.9542, PIIIQDIQII Mams, 1915.

' 2 SHEETS-SHEET l.

D. J. LAMBERT.

REFLECTOR FOR ELECTRIC LIGHTS.

APPLICATloN` FlLED JULYB. 1914.

Patented May 18, 191,5.

2 SHEETS-SHEET 2.

. bottom plan view of Fig. s.

UNITED STA DUDLEY J'. LAMBERT, OF FAIRBURN, GEORGIA.

REFLEGTOR FOR ELECTRIC LIGHTS.

Specification of Letters Patent.

Patented May 18, 1915.

Application filed July 8, 1914. Serial No. 849,730.

T0 all whom it may concern.:

Be it known that I, DUDLEY J. LAMBERT, a citizen of the United States of America, residing at Fairburn, in the county of Campbell and State of Georgia, have invented certain new and useful Improvements in Refleetors for Electric Lights, of which the following is a specification.

The present invention relates to an'improved reflector for electric lights.

The primary object of the invention is the provision of a reflector which is not only adjustable as to the size of the incandescent lamp ith which it is or may be used, but the reflector comprises two vreflecting mediums, one of which is adjustable as to the lamp and to the other medium so that the light rays may be reflected at certain predetermined angles and concentrated in certain directions.

A' further object or result accomplished by my novel construction of reflector is the elimination of shadows from the lamp so that. practically all the space around thereflector, except directly thereabove, is illuminated when the lamp is lighted.

The invention consists essentially in certain novel combinations and arrangements of parts whereby the two adjustmentsare accomplished, as will be hereinafter more particularly specified and pointed out in my annexed claims.

In the accompanying drawings I have illustrated one complete example of the physical embodiment of my invention constructed according to the best mode I have so far devised for the practical application of the principles of the invention, but it will be understood that I contemplate minor changes or colorable alterations, which I consider within the scopeof my claims, without departing from the spirit of my invention.

Figure l is a side elevation of one form of light reflector constructed according to my invention. Fig. 2 is asect1onal view on line 2-2 of Fig. 1 showing the lower reflector in top plan. Fig. 3 1s an enlarged 0 Fig.l l is a vertical transverse sectional view of the lower reflector' and adjustable lamp support. Fig. 5 is a perspective view of one of the segmental plales of the adjustable support. Fig. is a broken view showing in section a portion of the adjustable reflector and itsclamping bolts.

In the exemplifying drawings which accompany my specification and claims I have illustrated a lamp of the type usually employed in street lighting, that is adapted to be suspended from a pole, bracket, or other usual support, and this lamp reflector or light reflector comprises the lamp' holder l which is formed on itsunder side with the conical reflecting surface 2 of usual outline. This holder may be of suitable material such as metal, glass, porcelain, etc., and is fashioned to receive the incandesccntlamp 3 of standard type. At its top center the holder is provided with a suspending hook 4, and the electric feed'wires 5, 5 are passed around the insulating sleeves 6, 6 which are fixed upon the cross bar 7, to prevent entanglement of the wires.

The adjustable lower reflecting member comprises an open center, circular disk 8,

preferably of metal and formed with an upper reflecting surface 9 of suitable description. This open center disk is severed on a line from its periphery to the open center so that its edges 10, 10 are made to overlap each other, and by thus fashioning the reflector it is capable of variety as to its circumferential extent and also as to the size of the open center 11. Adjacent the edges ll of the conical disk are arranged a series of perforations 1Q, 19. for the reception of fastening screws or bolts 13 which are provided with nuts 14 for clamping the edges together and holding them firmly in adjusted position. By'means of these clamping devices, the size of the reflector' may be varied to suit different lamp bulbs, and the clamping devices hold the part in adjusted position.

The reflector disk 8 is suspended from the holder by means of three rods l5, which are threaded at their upper ends to receive the adjusting nuts 16 which clamp the perforated holder both aboveV and below, and the lower ends of these rods are passed through radial slots 17 in the reflector 8, their heads 18 supporting the reflector. By means of this arangemcnt of adjusting rods or bars 15 and the slotted connection to the reflector, the latter may be turned to various positions as indicated in dotted lines Fig. l in order to throw the rays of light emanating from the lamp in desired direction.

Beneath the lower reflector is arranged a supporting plate made up of segmental plates 19 that are slotted at 20. When placed in their proper positions with rela-- tionV to the under surface of the lower reflector, these segmental plates, four in number, form a conical, open center support for the reflector, Withl the central opening embracing the lamp bulb as shown in Fig. 1. The adjoining edges of the segmental plates overlap, and each segment is clamped to the reflector-8 by means of va bolt or screw 20, and nut 21, passed through a perforation in the reflector and one .of the slots in the segments. By this slotted connection the diameter ofthe conical supportmay be varied both as to its peripheryand as to its central opening, and theV variations in the latter permit the support to be used on different sized lamp bulbs, and When so used the support provides a very efficient means .of rigidly connecting the lamp as a part of the bracing of elements of the double re- Hector.'

It will be seen that the lower end of the lamp bulb projects through theopen centers of the lower reflector and its support, and thus the space or area directly beneath the lamp is illuminated so that no shadows are cast by intervening parts, and this condition exists even when thek lower reflector is tilted or adjusted as shown in dotted lines Fig. l. By this means a maximum of elh-I ciency in lighting is obtained, and it is possible to direct some of the rays of light in a desired direction. l/Vhile I have described the device as adapted to street lighting it kwill of course be understood that'the device is also useful for oliice or household purposes, and in fact is applicable Wherever such devices are generally utilized.

Having thus fully described my invention, v

what I claim as new and desire to secure by Letters Patent is 1. The combination in alight reflector with a lamp holder having a reflecting surface, and a lamp, of a second reflector having an open center about the lamp, said second reflector comprising a conical open center divided disk With means for securing together its edges. j

2. The combination in a light reflector with a lamp, of' a conical open center divided disk forming a reflector and means for holding its edges togetherLand an adjustable support for said disk having an open center embracing the lamp.

3. The combination with a lamp, -`of a conical open center divided disk reflector with means for holding its edges together, of an open center adjustable supporting plze for said reflector embracing the lamp 4. The combina-tion with a lamp and its holder, of a conical open center divided disk reflector with means for holding its edges together, of an open center adjustable support madel up of segmental plates each adj ustably 'connected to the disk reflector' embracing the lamp bulb.

5. The combination with a lamp and its holder forming a reflector, of an open center divided disk reflector having clamping means and formed With radial slots, adjustable supporting rods suspended from the holder-and engaging the slotted disk, and an open center support for the disk embracing the lamp bulb comprising slotted segmental plates Wit-h means for clamping each plate in adjusted position tothe disk.

In testimony whereof I alfix my signature 

